From 290ba200815fdecb4d40dc942499c4ea6d0c4624 Mon Sep 17 00:00:00 2001 From: Vikram Kandukuri Date: Thu, 2 Jul 2009 14:31:59 +0530 Subject: [PATCH] Bluetooth: Improve USB driver throughput by increasing the frame size This patch increases the receive buffer size to HCI_MAX_FRAME_SIZE which improves the RX throughput considerably. Tested against BRM/Atheros/CSR USB Dongles with PAN profile using iperf and chariot. This gave significant (around 40%) increase in performance (increased from 0.8 to 1.5 Mb/s in Sheld room) Signed-off-by: Vikram Kandukuri Signed-off-by: Marcel Holtmann --- drivers/bluetooth/btusb.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index e70c57ee4221..124db8cd144c 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -301,7 +301,7 @@ static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags) struct urb *urb; unsigned char *buf; unsigned int pipe; - int err, size; + int err, size = HCI_MAX_FRAME_SIZE; BT_DBG("%s", hdev->name); @@ -312,8 +312,6 @@ static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags) if (!urb) return -ENOMEM; - size = le16_to_cpu(data->bulk_rx_ep->wMaxPacketSize); - buf = kmalloc(size, mem_flags); if (!buf) { usb_free_urb(urb); -- 2.30.2